LoopFest XXIV

Session

Parallel Session c

28 May 2026, 14:00

Physics Department (510) Small Seminar Room

Conveners

Parallel Session c

• Sebastian Jaskiewicz

2. The spectrum of Feynman-integral geometries at two loops

Piotr Bargiela (The University of Edinburgh)

28/05/2026, 14:00

In this talk, I will present the results of our recent paper arXiv:2512.13794 for a complete classification of the Feynman-integral geometries at two-loop order in four-dimensional Quantum Field Theory with standard quadratic propagators. Concretely, we consider a finite basis of integrals in the ’t Hooft–Veltman scheme, i.e. with D-dimensional loop momenta and four-dimensional external...

6. Tropical Integration for Gauge Theory Feynman Integrals

Shun-Qing Zhang (Max Planck Institute for Physics)

28/05/2026, 14:20

I will present recent progress in extending the tropical integration framework originally proposed by Borinsky to Feynman integrals with numerators. This generalisation is essential for applications in gauge theories and significantly broadens the scope of tropical Monte Carlo methods to physically relevant observables in Quantum Chromodynamics (QCD) and N=4 super Yang–Mills theory (SYM).

I...

60. On Leading Singularities and Canonical Bases beyond Polylogarithms

Cesare Mella

28/05/2026, 14:40

Feynman integrals associated with geometries beyond the Riemann sphere, such as elliptic curves, K3 surfaces, and Calabi-Yau manifolds, are playing an increasingly important role in modern precision calculations, from collider physics to gravitational-wave theory. A systematic way to evaluate these integrals is through differential equations, with the goal of casting them into
epsilon-form,...

12. Calabi-Yau Periods in Black Hole Scattering at the Fifth Post-Minkowskian Order

Christoph Nega (employee@tum.de;member@tum.de;faculty@tum.de;alum@tum.de)

28/05/2026, 15:00

In recent years, it has been observed that period integrals of Calabi-Yau manifolds, which originate from the compactification of string theory, appear in the classical scattering of black holes. These mathematical structures were observed for the first time at the fifth post-Minkowskian (5PM) order. In my talk, I will provide a brief introduction to these objects, particularly from a...